Concentration of a Solution: Beer’s Law The objective of this experiment is to determine the concentration of an unknown copper sulfate solution. You will be using the Colorimeter. In this device‚ red light from the LED light source will pass through the solution and strike a photocell. A higher concentration of the coloured solution absorbs more light (and transmits less) than a solution of lower concentration. The Colorimeter monitors the light received by the photocell as either an absorbance
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BUFFERS By: Luis P. Bazan‚ RPh.‚ Ph.D. A buffer solution is a solution of: 1. A weak acid or a weak base and 2. The salt of the weak acid or weak base Both must be present! A buffer solution has the ability to resist changes in pH upon the addition of small amounts of either acid or base. Consider an equal molar mixture of CH3COOH and CH3COONa CH3COOH (aq) H+ (aq) + CH3COO- (aq) Adding more acid creates a shift left IF enough acetate ions are present 16.3 Which of the
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Taylor Tomczak POLS 301 20 May 2013 Change & Proposed Solutions I began to take interest in the Child Protective Service procedures because of all the neglect I have seen in the news‚ mainly the Jaycee Dugard ordeal. Another recent Child Protective Service blunder was the case of Ariel Castro‚ who abducted three girls ten years ago. It’s baffling to me that Child Protective Service case workers can visit a residence and not completely investigate the situation. There have been many circumstances
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05.05 Mixtures and Solutions Background: Paper chromatography is one method for testing the purity of compounds and identifying substances. Paper chromatography is a useful technique because it is relatively quick and requires small quantities of material. Safety: Warnings: * Rubbing alcohol (or isopropyl alcohol) is flammable‚ so be sure to keep it away from high heat or heat sources. * Keep pigments and solutions away from your eyes‚ wash your hands carefully after coming in contact
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not be able to afford college or won’t be able to pay off their debt. College debt is becoming a problem but there are solutions that such as‚ scholarships‚ working and saving‚ and attending state or community college. There are many solutions to college debt but the best solution is seeking scholarships. More and more students are getting into college debt
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Q1) What is the industry attractiveness like in 1997? Has it changed in recent years? Q2) Does Airborne Express have a competitive advantage? Is it sustainable? Q3) What recommendations will you give Airborne Express? ---------------ESSAY START ------------------ Industry Attractiveness in 1997 The industry is defined as the Domestic US Express Mail industry. This includes overnight and second day delivery. In order to assess the attractiveness of the industry‚ a Porters’ Five Forces analysis
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along the snow. The force in the rope (tension) is 94.0N. How much work is done on the sled? Solution: W= Fd W= 94.0N x 35.0m W= 3290 Nm or J 2. The cable of a large crane applies a force of 2.2x10^4N to a demolition ball as it lifts it vertically a distance of 7.6m. a) How much work is done on the ball? b) Is the work positive or negative? Why? Solution: A.) W=( 2.2x10^4N) ( 7.6 m) W= 1.6x10^5 Nm or J B.) Positive‚ because the force
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ANSWERS page 1 page 2 ELL Support 7-1 7-1 Exploring Exponential Models exponential function exponential growth exponential decay growth factor decay factor 1. Is an exponential model reasonable for this situation? Explain. 1. In the function y 5 12(2.3)x ‚ the value 2.3 is the growth factor . asymptote 2. An Yes; the population decreases at a fixed‚ constant rate of 3.5% per year. is a line that a graph approaches as x or y increases in An exponential model is reasonable absolute
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ISyE 3104: Introduction to Supply Chain Modeling: Manufacturing and Warehousing Instructor : Spyros Reveliotis Summer 2003 Solutions for Homework #1 Chapter 1 Operations and Productivity DISCUSSION QUESTIONS 1. Define Operations Management in your own words. Operations management can be defined as the field that deals with the effective and efficient design and operation of the transformation processes that provide the various goods and services.. 2. Consider the potential contribution
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Solution Focused Therapy or Brief Therapy is a counselling technique that focuses on solutions in the present and future instead of the past. It is a short-term goal focused approach that moves clients away from their problems to solutions. Solution focused therapy is based on the idea that to help clients focus on things related to how change happens rather than concentrating on how problems develop. Solution focused therapy focuses on the future and how life will be better when their goals
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